Refuse-furnace.



LQSQAGS.

APPLICATIQN FILED NOV. 6, |912A E. KIDWELL.

REFus FunNAcE.

Pmmed sept. 4, 191'?. f

E. KIDWELL.

Refuse rdm-ecs. APPLICATION FILED NUV- 6. i912.

Patented Sept. 4, 1917.

3 SHEETSSHEET 3.

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EDGAR KILDWELI, 0F WASHNGTON, 'DISTRICT 0F COLUMBIA, ASSIGNOR TO WASTE UTILITIES, COMPNY 0F DELAWARE, OF-NEW YGRK, N. VY., A CORIORATON OF DELAWARE.

lEFUSE-FURNACE. 'Y

menace.; Q

Speciieation of Letters Patent.

, Patented .sep-t. e; ser?.

v'Lpnlcation-led-iiovein'ber 6, 191973. Serial No. 729,737.

To aZlLvLo/m it may concern.' y

Be it known that l., EDGAR KIDWELL, a

citizen of the United States, and a residentI of Washington, in the District of Columbia, have invented a newand useful Improve- -ment in .Refuse-Furnaces, of which the iollowing isa full, clear, and exact description, reference heinghad to the accompanying drawings', forming part of this specification, in Wh1cl1- Figure l is a longitudinal vertical section showing a 'portion of a furnace constructed in accordance With-my invention;` A

Fig. 2 is a' vertical cross. section of the main grate and connections;

Fig. 3` isa view similar to showing a modification; and Figs. l and 5 are longitudinal and `transverseverticalsections showingl another form c e invention.

The invention relates to the -burning of garbage or ,lori-grade fuels, and particularly,` to 'fthe type of furnace setorth in the UnitedStates Patent to Fried No. 1,002,575. In thattype of furnace, the slagged material is drawn from the main grate forwardly ,upon a foregrate, to which airis supplied,

the. heated air passing from vthe oregrate to the fuel onthe main grate and assisting in the combustion. After theV slagged niateral onthe foregrate has been employed to heat the air2 it is pulled forward and removed rom'tlns oregrate. In thepreterred form, air is supplied to both grates, each under separate control, for better combustion, 'in accordance withl theFried process.

One of the objects of my invention is to do away with hand labor in Withdrawn? the v slagged material'from the foregrate orv rom the main grate to thelforegrate or both. To that end, it consists in a power-operated pusheror pushers arranged to move the slaggedmaterial forwardly on one or both grates.

In the drawings, referring to the' form oi 1 Figs. 1 and 2, 2 represents the main grate,

and may Vbe of' any desired forni.

which is preferably of hollow stepped form, shown in Fig. 2, havingair holes 3, leading into it from the air jacket space 4, to "which air is supplied under pressure. 5 is the f oregrate, which is at a somewhat lower level, At the rear end of the foregrate and in the jacket space of the main grate, as shown, arrange a hydraulic pusher G, fitting; neatly Fig. 1, but

tacle.

Within a casing 7. T his pusher is preferably flat and substantially rectangular `in .cross section. It is secured'to the front endof a piston rod 8,`Which extends throughstufling boxes "9 and 10, and is securedto a piston 60 11 in motive cylinder 12.

The air for the main grate is supplied through branch'pipes 13, which ',embrace'the pusher casing and enterY the air jacket above it. The branches 13 leadfrom a vulved ex- 65 tension 14, of the main 15, for supplying air under pressure. A valved pipe 16 also leads from the main to' deliver air to the foregrate.

In the operation ofthe device, thegar-V `bage is intermittently. dropped.into the main ehamberl?, and upon the main grate 'thereof, and as the material is slagged, it is ,drawn forward upon the foregrate. The air fed to the foregrate becomes.' heated and passes .hack over the garbage on the msi-in grate; 7 5

the cylinder 12',v thus forcing' the'pusher for- 85 u Ward and ejecti'nghthdslagged material 'from the oregr'ate out ,into Acar or other recenhe slagged material on the main .A grate may be drawn f,rward,'or'fiovv 'fore' Ward, as desired, After the sla'gged mate- 90 rial is ejected from the foregr'ate, the pusher is Withdrawn within Iits case or'sheath, and- 'its end is preferably beneaththe front-end of the main grate toprotect it from the. Y

ashes or slagge'd material. 95-1' In Fig. 3, l shdvfl' a form similarto that of Fig.' 1, except thatl the closed chamber 7 around the pusher til-is done away with, andV the wall .18, through a hole 'in which the' front end of the pusher worlrs, is suitablypacked around 'the pusher-to prevent entrance of ashes or slagged material into the' air chamber below the grate. ln other V Words, instead 0T packing the back end of' a closed pusher chamber, I pack-the hole 19e through which the -fortvard end of the j. pusher operates, In this case, .have also shown a pipe 19.J entering the to'p o the@ main chamber, and through which pulver--r ized or granulated fuel may be fed. This' 110 l furnace is capable of use with low-grade fuels, either with or without the use of the garbage. If lthe garbage is used, it is dropped at intervals from the hole below the hopper Wl1ich is opened and Vclosed by thestopper or valve device 21. AsuitF able feeder is attached to pipe 19, itt this is used, so Athat-the pulverized or granulated fuelinay be fed either continuously or intermittentlyas desired.

In Figs. 4 and 5, l. show another'ferin, wherein a pusher 22 is provided for the main grate thispusher being operated by another hydraulic cylinder Q3. This pusher may be set at an angle to the horizontal 'to suit'the angle of the grateand may lit the I y loiver trough portion of the grate.

The advantages of my. invention iirsult from doing away with hand labor in moving the material 0n the grates.

"By the Word refuse iny my claims, l' intend to cover any low-grade combustibles. lMany changes may be made in the form and arrangement of the gratos, the air supply, etc., ,Without departing from my in- I claim:

v1. A refuse-burning furnace having.' av

main combustion grate with an imperforate ranged to receive slagged material from the iaingrate, means for separately supplying airr to each grate and regulating the-supply 'to the inaingrate, a jacket lfor the main grateI forming the air chamber, and a poweractua'ted :pusher arranged to push the slagged material oil' the oregrate out of the furnace, Vsaid pusher operating through the jacketispace of the main grate, substantially as described. j y

In testimony whereof, I `have hereunto set rnyhand. y y l `EIDGrAR KIDWELL. A Witnesses: 1

K, W. L. KIDWELL,

0.1). Brenes. I 

